Question

Which pair of molecules is not a polar bond?

N - O

C - O

O - H

O - O

Answer 1

Answer: O - O

Step-by-step explanation: Polar molecules are those which contain polarity in the molecules. Polarity is developed due to the presence of elements of different electronegativities.

Molecules which contains elements with similar electronegativity will be non polar in nature.

Thus O-O with two similar elements will be non polar in nature.

Answer 2

The O-O molecule is not polar since it is the only molecule in the list that has two atoms that do not have a difference in electronegativities.

I hope this helps. Let me know if anything is unclear.